Read Section 6.2.2 of the manual. It will explain how to enable an external monitor on each system. When running Hog 3 pc the 3rd and 4th monitors will appear as separate windows you can move to another screen or resize to fit on your desktop. Use the move button at the top of the right screen to move a highlighted window to another screen.
The problem is actually in Parallels. I am trying to figure out how to get the video adaptor to use both screens. I have adjusted the settings but to no avail.
